Proton conduction in LaSrScO3 single crystals

J. Liu, Y. Chiba, J. Kawamura, H. Yugami

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Transparent single crystals of La1-xSrxScO3 (x = 0.01, 0.03) were grown by the floating zone method. The optical and the electrical properties were studied by infrared absorption spectra and AC-impedance measurements, respectively. Our results showed that proton conduction becomes dominant in La0.97Sr0.03ScO3 single crystals below 700 °C. The electrical conductivity increases as the amount of Sr increases. At 600 °C, La0.97Sr0.03ScO3 had a proton conductivity of 4.89 × 10- 3 S/cm. This value is almost the same as that in the literature for La0.9Sr0.1ScO3 ceramic samples. It was revealed from infrared absorption spectra that several different sites are occupied by protons in this material. Furthermore, it was found that the intensity of high-frequency O-H bands can be related to the dopant-concentration dependence of the electrical conductivity.

Original languageEnglish
Pages (from-to)2329-2332
Number of pages4
JournalSolid State Ionics
Issue number26-32 SPEC. ISS.
Publication statusPublished - 2006 Oct 31


  • LaSrScO
  • Perovskite
  • Proton conduction
  • SOFC
  • Single crystal

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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